Tanaka Chemical Corporation

Toyota Jidosha Kabushiki Kaisha

Tanaka Limited

Mikio Hata

Taiki Yasuda

Shigeki Sato

Yasutaka Iida

Makio Kon

Naotoshi Satomi

Provided is a nickel composite hydroxide capable of reducing a calcination temperature when producing a positive electrode active material, and a positive electrode active material using the nickel composite hydroxide as a precursor. The nickel composite hydroxide for a precursor of a positive electrode active material of a non-aqueous electrolyte secondary battery, wherein when in the nickel composite hydroxide, a peak intensity of a diffraction peak on a (200) plane in powder X-ray diffraction measurement using CuKα rays is defined as α, and a peak intensity of a diffraction peak on a (013) plane in powder X-ray diffraction measurement using CuKα rays is defined as β, a value of α/β is 0.75 or more and 0.95 or less, and the nickel composite hydroxide comprises Ni, Co, Mn, and one or more additive elements M selected from the group consisting of Al, Fe, Ti and Zr.

Nickel composite hydroxide, positive electrode active material using nickel composite hydroxide as precursor, and methods for producing the same

A positive electrode active material for an alkaline storage battery having excellent over-discharge tolerance and high-temperature tolerance, and a method for producing the positive electrode active material. A positive electrode active material for an alkaline storage battery, containing a hydroxide particle containing at least nickel and solid-solubilized cobalt, and a covering layer containing cobalt, the covering layer covering the hydroxide particle, in which cobalt contained in the covering layer and cobalt contained in the hydroxide particle each have a diffraction peak between diffraction angles of 65&#xb0; and 66&#xb0;, the diffraction angles each represented by 2&#x3b8; in a diffraction pattern obtained by X-ray diffraction measurement.

Positive electrode active material for alkaline storage battery, and method for producing positive electrode active material for alkaline storage battery

An objective of the present invention is to provide a positive electrode active material that can inhibit the capacity changes associated with temperature variations, and an alkaline battery that contains this positive electrode active material. Aluminum and ytterbium are at least partially solid-dissolved in nickel hydroxide in the nickel composite hydroxide present in the positive electrode active material of the present invention.

Positive electrode active material and alkaline battery

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Fukui, Japan

Mikio Hata